//package com.cliang.tools.verifycode;
//
//import javax.servlet.Servlet;
//import javax.servlet.http.HttpServlet;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import javax.servlet.http.HttpSession;
//import java.io.IOException;
//
//public class AuthImage extends HttpServlet implements Servlet{
//    static final long serialVersionUID=1L;
//
//    public void service(HttpServletRequest request, HttpServletResponse response) throws IOException {
//        response.setHeader("Pragma","No-cache");
//        response.setHeader("Cache-Control","no-cache");
//        response.setDateHeader("Expires",0);
//        response.setContentType("image/jpeg");
//
//        //生成随机字串
//        String verifyCode=VerifyCodeUtils.generateVerifyCode(4);
//
//        //存入会话session
//        HttpSession session=request.getSession(true);
//
//        //删除以前的
//        session.removeAttribute("verifyCode");
//        session.setAttribute("verifyCode",verifyCode.toLowerCase());
//
//        //生成图片
//        int width=116,height=36;
//        VerifyCodeUtils.outputImage(width,height,response.getOutputStream(),verifyCode);
//
//    }
//}
